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39 lines
1.0 KiB
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39 lines
1.0 KiB
HTML
<p>给定两条线段（表示为起点<code>start = {X1, Y1}</code>和终点<code>end = {X2, Y2}</code>），如果它们有交点，请计算其交点，没有交点则返回空值。</p>
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<p>要求浮点型误差不超过<code>10^-6</code>。若有多个交点（线段重叠）则返回 X 值最小的点，X 坐标相同则返回 Y 值最小的点。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre><strong>输入：</strong>
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line1 = {0, 0}, {1, 0}
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line2 = {1, 1}, {0, -1}
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<strong>输出：</strong> {0.5, 0}
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre><strong>输入：</strong>
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line1 = {0, 0}, {3, 3}
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line2 = {1, 1}, {2, 2}
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<strong>输出：</strong> {1, 1}
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</pre>
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<p><strong>示例 3：</strong></p>
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<pre><strong>输入：</strong>
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line1 = {0, 0}, {1, 1}
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line2 = {1, 0}, {2, 1}
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<strong>输出：</strong> {}，两条线段没有交点
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</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li>坐标绝对值不会超过 2^7</li>
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<li>输入的坐标均是有效的二维坐标</li>
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</ul>
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